EP 2702605 A2 20140305 - DISCHARGE LAMP WITH HIGH COLOR TEMPERATURE
Title (en)
DISCHARGE LAMP WITH HIGH COLOR TEMPERATURE
Title (de)
ENTLADUNGSLAMPE MIT HOHER FARBTEMPERATUR
Title (fr)
LAMPE À DÉCHARGE À TEMPÉRATURE DE COULEUR ÉLEVÉE
Publication
Application
Priority
- EP 11163797 A 20110427
- IB 2012051956 W 20120419
- EP 12721354 A 20120419
Abstract (en)
[origin: WO2012147014A2] A discharge lamp comprises a discharge vessel 20 defining a sealed inner discharge space 22 with two electrodes 24. A filling consists of a rare gas and a metal halide composition and is free of mercury. The discharge vessel 20 comprises outer grooves 36 where the electrodes 24 are embedded, arranged at a groove distance Ra between them. The discharge vessel 20 further comprises an inner diameter ID. In operation of the lamp, an arc discharge is formed between the electrodes and the metal halide composition is partly evaporated. After operation of the lamp, the metal halide composition forms a film on the inner wall of the discharge vessel 20. This film has a surface area AS measured in mm2. The metal halide composition is provided in such an amount within the discharge space 22, that a matching quotient Q, calculated as Q = Ra x ID/As has a value of 2 or more, such that a high colour temperature is achieved.
IPC 8 full level
H01J 61/33 (2006.01); H01J 61/34 (2006.01); H01J 61/82 (2006.01)
CPC (source: EP US)
H01J 61/33 (2013.01 - EP US); H01J 61/34 (2013.01 - EP US); H01J 61/827 (2013.01 - EP US)
Citation (examination)
- WO 2011042830 A2 20110414 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- WO 2011018741 A2 20110217 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- WO 2010100935 A1 20100910 - HARISON TOSHIBA LIGHTING CORP [JP], et al & EP 2405464 A1 20120111 - HARISON TOSHIBA LIGHTING CORP [JP]
- US 2003098653 A1 20030529 - HAACKE MICHAEL [DE], et al
- EP 1189254 A2 20020320 - ADVANCED LIGHTING TECH INC [US]
- US 4574218 A 19860304 - BATEMAN JR ROBERT L [US], et al
- See also references of WO 2012147014A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012147014 A2 20121101; WO 2012147014 A3 20130117; WO 2012147014 A9 20130307; CN 103493175 A 20140101; CN 103493175 B 20160803; EP 2702605 A2 20140305; JP 2014512662 A 20140522; JP 6010111 B2 20161019; US 2014042889 A1 20140213; US 9368339 B2 20160614
DOCDB simple family (application)
IB 2012051956 W 20120419; CN 201280020258 A 20120419; EP 12721354 A 20120419; JP 2014506961 A 20120419; US 201214113772 A 20120419